66030405 has 16 divisors (see below), whose sum is σ = 120741504. Its totient is φ = 30185280.

The previous prime is 66030383. The next prime is 66030407. The reversal of 66030405 is 50403066.

It is not a de Polignac number, because 66030405 - 2⁵ = 66030373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66030407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314326 + ... + 314535.

It is an arithmetic number, because the mean of its divisors is an integer number (7546344).

Almost surely, 2^66030405 is an apocalyptic number.

It is an amenable number.

66030405 is a deficient number, since it is larger than the sum of its proper divisors (54711099).

66030405 is a wasteful number, since it uses less digits than its factorization.

66030405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628876.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 66030405 is about 8125.9094875589. The cubic root of 66030405 is about 404.1860500617.

The spelling of 66030405 in words is "sixty-six million, thirty thousand, four hundred five".